Windows 7: Cannot access my active main Administrator account.

10/3/10 My laptop suddenly turned off, I think it's because my laptop overheated (it was hot) So I waited 30 minutes then turning it on.
So I clicked my Administrator(main) account, typed my password and stuck with Welcome message.
I logged in with another account(another Administrator account) and used System Restore to fix the problem.
Now I have another problem, when I log in to my main Admin account it says "Welcome" then "Preparing your desktop".... then at the lower right corner it says you cannot access your files... it's temporary and will be deleted after you log off or something..
It tells me to log in later so I did...
I turned off the computer and didn't use it for a day and still it prepares my temporary desktop for this account.
Help please?

It sounds like you may have done some damage to your hard drive. Or at least damaged some parts of your user profile. I would suggest backing up any important data, and double checking that you made a back up of everything you will need. Then perform a full reinstall of your operating system.
If you still have problems run diagnostics on the drive.

Hi, thank you for reply. I do not want to reinstall my Windows 7 because if I did, it will now be a 32-bit )))
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Now I have something :

As you can see, my Administrator account's status is BACKUP and wtf is that thing.
I've read some topics relating this kind of issue and they say it's bad registry key problem or something..
any help please? )

Open up Control Panel>Administrative Tools>Computer management> Local Users and Groups>Users and you should be able to modify the administrator account.

Your use profile may be corrupted. Try the steps in this tutorial.

User Profile Error - Logged on with a Temporary Profile - Vista Forums

or

Fix a corrupted user profile

You can also try creating a new account.

Create a user account